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andrew11 [14]
2 years ago
10

2. In a certain school, there are 7 teachers for every 252 students. If there are 468 students, how many

Mathematics
1 answer:
Naddik [55]2 years ago
3 0

Answer:

66.6

Step-by-step explanation:

If 7 teachers for 252 student

We divide 468÷7= 66.6

66.6 teacher

Here you are

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(x+4)+(x-3)+(2x+2)+(x^2+3x+1)
rewona [7]

Answer:

X^2+7x+4

Step-by-step explanation:

8 0
2 years ago
Slope-rate of change- “if there were 12,000 in the Atlantic Ocean in 1950 and there are 3,600 dolphins today, what is the yearly
jasenka [17]

\bf \begin{array}{|cc|ll} \cline{1-2} \stackrel{x}{year}&\stackrel{y}{dolphins}\\ \cline{1-2} &\\ 1950&12000\\ 2018&3600 \\&\\ \cline{1-2} \end{array}~\hspace{5em}(\stackrel{x_1}{1950}~,~\stackrel{y_1}{12000})\qquad (\stackrel{x_2}{2018}~,~\stackrel{y_2}{3600}) \\\\\\ slope = m\implies \cfrac{\stackrel{rise}{ y_2- y_1}}{\stackrel{run}{ x_2- x_1}}\implies \cfrac{3600-12000}{2018-1950}\implies \cfrac{-8400}{68}~~\approx~~ \stackrel{\textit{rate of change}}{-123.53}


-8400/68 simplifies to to -2100/17,  dolphins/year, so 2100 less dolphins every 17 years.

and we can just divide those to get the decimal amount of -123.53, which means, 123.53  less dolphins every year.

of course, there's no such a thing as 0.53 of a dolphin, so, we can say "about" 123 less dolphins per year.

5 0
2 years ago
A circle with radius of 2cm sits inside a circle with radius of 4cm What is the area of the shaded region
Klio2033 [76]

ANSWER

12\pi \:  {cm}^{2}

EXPLANATION

We want to find the area of the shaded region.

We find the area of the smaller circle and subtract from the area of the larger circle.

Area of smaller circle is

a = \pi \: \times   2^{2}  = 4\pi

Area of larger circle is

A = \pi \:   \times {4}^{2}  = 16\pi

The area of the shaded region is:

16\pi - 4\pi = 12\pi

5 0
3 years ago
What is the circumference? Use 3.14 for π. Round to the nearest tenth if necessary.
Phantasy [73]

Answer:

I think it's A. 12.1 mm

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6 0
3 years ago
Read 2 more answers
8. The distance formula is d=rt,
WITCHER [35]
252=45h
h=5.6 hours long
7 0
3 years ago
Read 2 more answers
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